Crusher tool for gyratory crushers

ABSTRACT

A crusher tool for gyratory crushers comprising a stationary crushing ring and a rotary and tumbling crushing cone which on their opposed cooperating conical working surfaces are provided with a novel type of cooperating concentrically arranged annular projections and depressions, respectively. The annular projection on the crushing ring in cross section is rectangular with rounded corners and is adapted to enter into a correspondingly shaped annular depression formed in the crushing cone, except that the vertical flanks of the projection are spaced from the vertical walls of the depression in the crushing cone. The height of the annular projection on the crushing ring is at equal or greater than the depth of the associated annular depression in the crushing cone.

Unite States Patent [72] Inventors Harms Decker Kola-Ruth; I Helmut S k1' Wesseling Bei lfioln, limb of, y [21 Appl. No. 885,467 [22] FiledDec. 16, 1969 [45] Patented Sept. 7, 119711 [73 AssigneeKloekner-lllumboldt-Deutz Alktien Koln-Deutz, Germany [32] Priority 2 1,11968 [3 3] Germany [31] P18 116 359.2

[54] CRUSHER TOOL FOR GTORY (3RUSHERS 9 Claims, 2 Drawing Figs.

[52] 111.8. Cl. 2411/2293 [51 1802c 2/04 1 241/207,

208,209,210,211,212,213,2l4,2l5,2l6,293

Primary Examiner Granville Y. Custer, Jr. Attorney-Singer, Stern andCarlberg ABSTRACT: A crusher tool for gyratory crushers comprising astationary crushing ring and a rotary and tumbling crushing cone whichon their opposed cooperating conical working surfaces are provided witha novel type of cooperating concentrically arranged annular projectionsand depressions, respectively. The annular projection on the crushingring in cross section is rectangular with rounded corners and is adaptedto enter into a correspondingly shaped annular depression formed in thecrushing cone, except that the vertical flanks of the projection arespaced from the vertical walls of the depression in the crushing cone.The height of the annular projection on the crushing ring is at equal orgreater than the depth of the associated annular depression in thecrushing cone.

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PATENTED SEP 7197] S d r W .f. W

2 M H m W CRUSHER TOOL FOR GYRATORY CRUSHERS The invention relates tocrusher tools for gyratory crushers, consisting of a crushing cone and acrushing ring which have on their working faces interengaging,concentric prominences and depressions which form in axial section atoothor undulated-profile, whereby at any one time a toothor wave-frontof one crushing member lies opposite a toothor wave-frontspace of theother crushing member.

At the comminution to final grain sizes of to 25 mm., for many purposesof use predetermined requirements are made as to the grain form, as withblast-furnace-ready ore grains or fine-gravel grains or refined gravelgrains for roadand concrete-construction. By way of example, for roadconstruction, fine gravel grains are required which contain no more than20 percent of parts by weight of laminated and pointed grains. Asparticularly the rocks or stones utilized for road construction bynature break fragmentally or laminated, it is necessary to provide forthe comminution by means of gyratory crushers a particular crushing toolfor the gyratory crusher.

Crusher tools with concentric teeth disposed on their conical workingfaces are known and the present invention is an improvement.

The object of the invention is to employ tooth forms which make itpossible to produce greater quantities of cubic finegrains and at thesame time to reduce the proportion of finest grain as well as theproduction of too coarse grain or oversize pieces.

in accordance with the invention, the head cross section of the toothform is rectangular or trapeze-shaped and has shoulders or curvatures ofdesired size at the corners, and the surface of the correlated gap hasan approximately similar geometrical shape.

Several heads may be disposed on the working faces of the crushingmember concentrically to one another on annular or circular lines withdiameters increasing toward the base of the cone. A preferredarrangement provides a wide head on the working surface of the crushingring, to which a correspondingly wider gap is allotted in the workingface of the crushing cone.

It was found that with this arrangement, particularly good results areobtained if the crusher gap extending between the working faces ofcrushing cone and crusher ring is so dimensioned that the crusher spacevolume toward the base of the cone increases progressively or stepwise.This is attained in accordance with the invention by a correspondingdimensioning of the height of head, of the depth of the correlated gap,and of the distances between the side flanks of head and gap. The samepurpose serves also the dimensioning of the width of the gap betweenconically shaped working surfaces of the crushing cone and the crushingring on both sides of the tooth. In one embodiment of the tooth formaccording to the invention, there is provided for the same purpose, thatthe cutting edge of the head and the cutting edge of the gap correlatedwith it, in the phase ofits greatest mutual approach are parallel to oneanother or include an acute angle, respectively, at greatly roundedforms according to the cone base converge or diverge. The most favorablecourse of the contours depends upon the construction measurements of thecrushing mem bers, the physical properties of the material to be brokenand the static and dynamic forces acting upon the material to be broken.It is provided to make the surfaces of the crushing members subjected tothe greatest wear, preferably the tooth edges, of a harder material thanthe bodies of the crushing members.

The drawings illustrate by way of example an embodiment of a crushertool according to the invention.

In the drawings:

FIG. 1 shows the crusher arrangement in axial section, and

FIG. 2 shows the interengaging parts of the working faces on a largerscale, likewise in axial section.

Referring to the FIGS. of the drawing, it should be understood that thecrushing ring l is secured in the machine housing. The crushing cone 2is so positioned that it may carry out a tumbler movement about the apexof the cone, whereby in cyclic sequence all parts of the working facesduring each revolution pass through the phase of greatest mutualapproach (as shown to the left in lFlG. i). in FIG. 2. are illustratedmore clearly details of a preferred form of tooth construction, likewisein the phase of greatest mutual approach of the working faces. Theworking faces in the example shown are comprised of upper and lowerconical ring surfaces on both sides of a tooth construction, which inaxial section has the shape of a broad rectangular tooth, which risesfrom the downwardly facing face of the crushing ring 1, and whoseprofile is formed by side flanks 3 and 4 and a broad tooth head surface9, and to which a tooth gap is correlated in the crushing cone 2, whoseprofile is limited by its side flanks 5 and 6 and base face llll andhave a geometrical form similar to the tooth 3, 9 and 4. The edges Ml ofthe profiles of tooth and gap are rounded. The radius of these roundingsmay be held very small when easily breaking material is to becomminuted. The radius may be selected larger in other cases withadvantage as far as the resistance to wear of the tool is concerned. Ifthe radius is selected larger than half the height 16 of the tooth, thenthe rectangular form of the tooth is changed to a waveshape, in whichthe side flanks converge toward the tooth head 9. Similar relationsresult if a trapezoid is selected as a base shape for the toothconstruction.

The desired quality of the broken material is, as a rule, attained withone tooth on the crushing ring 1, but it is also possible to arrangewith advantage several teeth or their combination on the crushing ringwith concentric prominences and depressions of other cross-sectionalform under certain circumstances. An important characteristic of thetool in accordance with the invention consists therein, that the angleof slope of the broken material building up in the phase of the greatestmutual distance of the work faces from the outer flank 5 of the gapprevents definitely the dropping through of too coarse grain or oversizepieces. In this manner, at high weight rate of flow, a retension of theindividual particles in the breaking zone is attained, which issufficient to align once practically all grains of excess size, so thatthey are grasped directly by the work faces, without it coming to anuncontrollable mutual squeezing into a thickly layered material bed.Also the danger of the briquetting is thereby prevented. There is formeda continuous material bed moving toward the base of the cone. Thematerial is loosened up and constantly turned over in view of theincreasing cross section of the breaking gap.

On the edges 14 the remaining flat and elongated pieces of material arebroken, so that a great portion of cubic bodies is produced with adecreased portion of fine grain. In order to control the turning over inthe material bed in a desired manner, the base line of the gap may becorrespondingly formed, preferably so that it forms in the dash-dottedline direction 20 with the cutting edge 9 of the tooth head an acuteangle, so that both lines (each according to the type of material to bebroken and size of the cone angle) converge or diverge toward the baseof the cone. Logically this rule holds good also for curved cuttingedges.

in order to take into account the subsequent adjustability of thecrushing cone when wear has occurred, it is of advantage when with a newtool the flank distance 13 is made equal to or greater than the flankdistance 12 arranged at a higher point toward the cone tip 0. Also thedepth ll5 of the gap in the crushing cone 2 is selected equal to orgreater than the height 16 of the tooth correlated with it. Withreference to the wear occurring and the subsequent adjustmentnecessitated thereby the gap width l8 between the upper cone ring faces10 in the phase of the greatest approach to the crushing members 1 and 2is also made equal to or greater than the lower gap width 19.

in the interest ofa loose material bed the distance 17 of the head Qfrom the surface ill of the correlated gap in the phase of its greatestapproach should be equal to or greater than the gap widths 18, 19 onboth sides of the head. A favorable adjustment is the result when thetooth head surface 9 at a greater approach to the crushing cone 2 enterssomewhat in the gap associated with it, as indicated by the dash-dottedlines 7 and 8.

The tooth edges 14, which are subjected to a particular heavy wear mayto advantage (for example, by means of a welding operation) be made ofamaterial which is harder than the material of the bodies of the crushingmember 1 and 2.

In operation the crusher tools according to the invention have exhibitedfavorable results for the specific energy consumption and on account oflow inner friction in the loosely disposed material bed and also onaccount of the elimination of the undesirable finest grains a very highdegree of efficiency was obtained.

What we claim is:

l. Crusher tool for gyrating crushers, comprising a crushing cone and acrushing ring, each provided with a conical working face, one workingface having thereon a concentric annular projection and the otherworking face having thereon a concentric annular depression, saidprojection and depression being provided for interengagement with eachother, said projection (9) in axial section forming a tooth-profilewhich is substantially rectangular with rounded corner portions at theedges (14), said depression (11) in the oppositely disposed conicalworking face forming a tooth gap having in axial section a substantiallysimilar geometrical form as said projection. 1

2. Crusher tool according to claim 1, in which the depression (11) isarranged in the conical working face of the crushing cone (2) and thatthe bottom of said depression is wider than the head (9) of theprojection in the associated crushing ring (1).

3. Crusher tool according to claim 1, in which the distance (13) betweenthe flank of the tooth-shaped projection (9) and the adjacent flank inthe depression (11) near the base of the crusher cone (2) is at leastequal to the same distance (12) between the flanks of this projectionand depression disposed closer to the apex of the crushing cone.

4. Crusher tool according to claim 1, in which the depth (15) of thedepression (11) in the crushing cone 2 15 at least equal to the height(16) of the projection (9) on the crushing ring.

5. Crusher tool according to claim 1, in which the width 'of the uppergap (18) between the working faces in the phase of the greatest approachof said conical working faces is at least equal to the width of thelower gap (19) between said working faces adjacent the base of thecrushing cone.

6. Crusher tool according to claim 3, in which the distance (17) of theouter face of the projection (19) on the crushing ring (1) from thebottom surface of the depression (11 in the crushing cone (2) in thephase of its greatest approach of said working faces is at least equalto the width of the spaces (18, 19) on both sides of the projection (9)in the crushing ring (1 7. Crusher tool according to claim 1, in whichthe section line (20) extending from the apex of the conical workingfaces and along the bottom of the depression (11) of the crushing cone(2) and the section line extending along the surface of the projection(9) on the crushing ring (1) in the phase of their greatest approachform an acute angle and converge toward the base of the conical workingfaces.

8. Crusher tool according to claim 1, in which the section line (20)extending from the apex of the conical working surfaces and along thebottom of the depression (11) of the crushing cone (2) and the sectionline extending along the surface of the projection (9) on the crushingring (1) in the phase of their greatest approach form an acute angle anddiverge toward the base of the conical working faces.

9. Crusher tool according to claim 1, in which the edges (14) of theprojection and depression on the crushing cone and crushing ring consistof a harder metal than the bodies of said crushing cone and crushingring, respectively.

1. Crusher tool for gyrating crushers, comprising a crushing cone and a crushing ring, each provided with a conical working face, one working face having thereon a concentric annular projection and the other working face having thereon a concentric annular depression, said projection and depression being provided for interengagement with each other, said projection (9) in axial section forming a tooth-profile which is substantially rectangular with rounded corner portions at the edges (14), said depression (11) in the oppositely disposed conical working face forming a tooth gap having in axial section a substantially similar geometrical form as said projection.
 2. Crusher tool according to claim 1, in which the depression (11) is arranged in the conical working face of the crushing cone (2) and that the bottom of said depression is wider than the head (9) of the projection in the associated crushing ring (1).
 3. Crusher tool according to claim 1, in which the distance (13) between the flank of the tooth-shaped projection (9) and the adjacent flank in the depression (11) near the base of the crusher cone (2) is at least equal to the same distance (12) between the flanks of this projection and depression disposed closer to the apex of the crushing cone.
 4. Crusher tool according to claim 1, in which the depth (15) of the depression (11) in the crushing cone (2) is at least equal to the height (16) of the projection (9) on the crushiNg ring.
 5. Crusher tool according to claim 1, in which the width of the upper gap (18) between the working faces in the phase of the greatest approach of said conical working faces is at least equal to the width of the lower gap (19) between said working faces adjacent the base of the crushing cone.
 6. Crusher tool according to claim 3, in which the distance (17) of the outer face of the projection (19) on the crushing ring (1) from the bottom surface of the depression (11) in the crushing cone (2) in the phase of its greatest approach of said working faces is at least equal to the width of the spaces (18, 19) on both sides of the projection (9) in the crushing ring (1).
 7. Crusher tool according to claim 1, in which the section line (20) extending from the apex of the conical working faces and along the bottom of the depression (11) of the crushing cone (2) and the section line extending along the surface of the projection (9) on the crushing ring (1) in the phase of their greatest approach form an acute angle and converge toward the base of the conical working faces.
 8. Crusher tool according to claim 1, in which the section line (20) extending from the apex of the conical working surfaces and along the bottom of the depression (11) of the crushing cone (2) and the section line extending along the surface of the projection (9) on the crushing ring (1) in the phase of their greatest approach form an acute angle and diverge toward the base of the conical working faces.
 9. Crusher tool according to claim 1, in which the edges (14) of the projection and depression on the crushing cone and crushing ring consist of a harder metal than the bodies of said crushing cone and crushing ring, respectively. 